Circuit-controller.



A. SIMON.

CIRCUIT CONTROLLER.

APPLICATION FILED NOV. 27. I911.

1,154,733. Patnt-ed'bept. 28, 1915.

1s l\ f ARTHUR SIMON, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO THECUTLER-HAMMER MFG. 60., 0F MILWAUKEE, WISCONSIN, A QORPORATION OFWISCONSIN.

GIBGUIT-GONTEOLLER.

Application filed November 27, 1911.

To all whom it may concern.

Be it known that I, ARTHUR SiMoN, a citizen of the United States,residing at Milwaukee, in the county of Milwaukee and State ofWisconsin, have invented new and useful lmproven'ients inCircuit-Controllers, of which the following is a full, clear, con else.and exact description, reference being had to the accompanying drawing,forming a part of this specification. My invention relates toimprovements in circuit controllers and more particularly to those forpolyphase alternating current circuits.

It is one of the objects of my invention to provide a circuit controllerwhich will. upon the occurrence of abnormal conditions in any phase ofthe controlled circuit, protect the translating; device or devicesconnected therein and at the same time fully protect its own controllingwindings.

Various other objects and advantages of my invention will be hereinafterclearly and fully set forth.

In order to disclose the nature and characteristic features of myinvention, I shall describe the controller diagrammatically illustratedin the accompanyingdrawing which embodies my invention in its pre ferredform. it should be understood however, that my invention may be carriedout by means of other instrumentalities than those illustrated in theaccompanying; drawinp; and may be used in other relations.

The controller selected for the purpose of illustration controls thecircuit of a motor 1 supplied with current from a three phasealternating current supply circuit. the lines of which I have numbered2, 3 and 4.

The controller includes a main switch 5 which may in practice be of anypreferred type. As illustrated this switch includes two movable contactmembers 6 and 7 provided with cooperating contacts 8 and 9 respectively.The contact members 6 and 7 are operated by a solenoid 10 through togglelinks 11. The contact member 7 is electrically connected by conductor 12to the left hand terminal of the motor. While its cooperating" contact 9is connected to the supply line 2. Contact member 6 is connected byconductor 13 to the right hand terminal of the motor while itscooperating contact 8 is connected by conductor 14 to supply line 4.Thus upon engagement of the contact Specification of Letters Patent.

'tacts and thus close the motor circuit.

Patented Sept. 28, 1915.

serial no. ecaevs.

The relay switch 17 thus serves to control the circuit of the operatingwindingof the main switch.

Relay switch 17 is provided with an operating winding: 19. One terminalof this winding connected by conductor 20 through a resistance 21 or ashort circuit around said resistance by conductor 22 to line 2-, whileits OPDOSltG terminal is connected by conductor 23 through a fuse 24 byconductor 25 through single pole central switch by conductor 27 toconductor 14 and thence to line 4-. Accordingly upon closure of switch26. the winding 19 of relay 1? is connected across lines 2 and 4.

The operation of the controller thus far described is as follows:Assumin,e the sevcral switches of the controller to be in the positionsillustrated, the motor circuit will be open. To start the motor theswitch 26 must first closed. This connects the winding 19 of relay 1'?across supply lines 2 and l as previously described. causing said relayswitch to respond and connect the op crating winding 10 of main switch 5across supply lines 3 and '1. 'Switch 5 thereupon responds causing thecontact members (i and 7 to engage their respective cooperating con- Therelay switch 17 must be closed and maintained. closed in order toenergize main switch 5.

The relay winding 19 being'connected across lines 2 and 4: and thewinding 10 of the main switch being connected across lines 3 and it isapparent that the energization of-these windings is dependent upon thevoltage conditions of all three phases of the supply circuit.Accordingly if after the motor circuit is closed, there should be anabnormal drop in voltage in any phase of the circuit. one or the otherof said windings would be deenergized. In either case,

- ViSlOIl is made for lazy switch ,the resists ice E51 is ll 2 ClOSlH"should be :1

iniure or en abhor nzil Cl Voltage across the lines 3 and ing 10 wouldbe we as to release the 11min. swiich l'iowcrcr, inin'lil; reemin i thecircuitl"- clo I. This would result in 4;, the "WlllCll: ned to such anex The relay i9 1 oil in fglie i 10, 'n the evenl; a partial. failure ofsailing across it zls. Further, if was l :1 partial in. we of; w e mightbe )ii iu'ed or even. uui'n -1 cu (l it be left" in c' cuil', under iihe{Lliifilfid conditions, Lilcew should the relay switch (ll-op on? uponii partial failure of voltage its Wind lm'left in circuit, therebycausing a pciuliture oi currc th ubjecting the same to n. the case ofshe Win(li no ire so provide nw v: 1

i isle of cxrrenl {Hill for contri'ilicr winning nnier also set $12..low describe the nmans ill for prm' ciu e; the "controller This nr isincludes the fuse once 53 Ni 2L swicoh. 0

main swwcn 5'5 lzo open close 7 ound the nee 21.

series Hail. the h. 1'. io he mpuhlc 1 I lief-ivy 7 mentor and connectedh a link 32 to n oi the wer g solenoid of i1: m: in l nner that when if,ilec iel meo ii 1.5 eciiuueu in 3d and 34- to coniulete lhe eircuuaround ihe c 7 l connects ac'hml eil lo iliseng l 'k: terrupi, aiilshort cur: upon respo 11min swuch 5. The resistance 21 inn excluded fromthe circuit of the relay "wnfling when the main mu 1 open and inserteilin circuit with relay winning when. the main switch. is closed. Thusprosecuring a comparatively of current for operating the reand thenreducing the flow of curreiit thrmigh the relay Winding upon. responseof the main switch. Tn practice, so designed that wl' n inseried in thecircuit of the relay winding heuvy si i rcrluce the how of curl-cuttherel'hrough to u m i which Sllhi winding may suii cly curry on lclowthe min: at which i he ifuse wells ilfnc l'use 2ishouhl i so dc? Q'ncd11s to curry the of. current (lesir rcl for operating 1e relay 101 esui'iicieni; time to enable the main swi ch close.

With k cincnt. i'l upon closure of she conir witch 26, the relay l9rcspomls and herea E1 the main switch.respomls in clue course cuecontroller will close the 1110- tor ciz'cuifi and maintain the someclosed. If, on the other hand, the main switch should fail to respondafter response of the relay due to an nlmornmlly low voltage in one omore phases of the supply circuit, then the continued heavy surge ofcurrent flowing hrough the relay winding would melt the fuse 24;. Thiswould cause interruption of the circuit of the relay which would openthereby interrupting the circuit of the Winding of :bhe main switch.This protects both windings against injury and also saves uselessBZPQIMlliIHI'C of energy. Assume now that upon closure of switch 26 therelay fails to respond (i116 to an nbnor- 11 life") in voltage acrosslines 2 and 4. once such conditions the 'esistzuice 21 is the result 1O;"-;-($l1" ,l'!l'(i with (iron in wiltug'e is sullicicnl; .OW oicurrent through the rete ii saic value bhc fuse 5% with the resultsnlorcsziic. 1115 e seen that the controller z'isures full protection tothe mo- 13])011 en ehvormul drop in voltage in 4 :13 phase of thei'riicuil". and at the some time i i rotect its own windiu as new andihf zfienl; of she U11 lei: for polyph'ese alterneh is, in. combination,means nlzinuifiy of circuit and a Keene-responsive devices derent phasesof the circuit pion thereof and upon one an- 3 or ciiinz'zinuedcnergizetion', said means operable by certain of said devices but "21resnonse of all end being defor retention. in circuit closing posincontinued energization of all of L. in e circuit controller for.polyphase alternating: current circuits, in combination, meanscontrolling the continuity of circuit, and a plurality ofelecbromesponsive devices including an operating device for said means,nnd'iinother device controlling said former device, said devices being nt-on different phases of the circuit for energizetion lthcreof and. saidcontrollingdevice heing responsive independently of said opmg (leviesbut dependent for continued.

dependent- Fri said devices and means controlling; the energizingcircuit of the letter device to render maintenance thereof dependentupon respouse of said. operating device within a limited periodfollowing response of latter device.

In polyphuse cir-o'uit controller, in combination, a plurality ofelectro-rosponsire switches re pousive successiv iv to close all phasesof th circuit, the operating u l ings of said-switches beingdepeniflent' fol their euergizzition upon the voltage conditions in theiiliiiereht phases of cii uit, means controlli g the ei'iergizingcircuit of the first res )OIlCllDg switch to open the after a temporaryperiod and means operated by the last responsive switch to render saidformer means ineffective.

5. In a, polyphuse circuit controller, in combination, a. plurality ofelectro-responsive switches responsive successively to close all phasesof the circuit, the operating Windings of said switches being dependent"for 5 their cnergizetion upon the voltage conditions in the difierentphases of the circuit, means adapted to open the energizing Crcuit ofthe first responsive switch but having a time element, permittingresponse of the lust X'GSPGETlSiVE- switch under nor-ma condi tions andmeans operated by the in st respousivc switch for rendering said formcrmeu'ns ineffective.

6. In an alternating current circuit controller, in combination, twoelectro-responsive devices dependent for their energizution. upon theelectrical conditions of diiicrent phases of the circuit, one or saiddevices controlling the energizing circuit the or other and means;controlling the energizi circuit of the former device to rend-c1."incintenunee thereof dependent uponjresponse and continued energizutionof the'other of said devices. 7 In an. alternating current circuitcontrolle in combination, two eiectrorespon sive devices dependent fortheir energimtion upon the voltage conditions of different phases ofcircuit, one of said devices c0ntroiliug the encrgimtion of the other,and the former being initially responsive independent of the latter andmeans rendering continued energization of said former device dep ientupon the response of said latter do e Within a limited period followingthe onse or said "former device.

l 8. In an alternating current circult eontroiler. in coinlunntion, twoelect-r0 resp0n' sive devices dependent for their energizetiou upon thevoltage conditions of diiierent phases of the supply circuit, one ofsziid devices controlling the energizing circuit of the other, a fuse incircuit with the operating winding of the first respondingdcvice, saidfuse tending to interrupt the circuit thcrethrough after the lapse of a.temporary period and means operated upon the-response ot the otherdevice to protect sand fuse,

In an alternating current circuit controiier, in conihizuition, twoelectro responsive devices tion upon the voltage conditions of diiierentphases of the controlled circuit, means ne cersituting the response ofone of said devices prior to res 'ionse of the other, a fuse in circuitwith the operating" winding of v the former and a resistance for thecircuit of the former device controlled. by the latter device, said fusetending to interrupt the circuit of the former device unless the latterdevice o 'ieratcs within a predetermined time.

10. in u polyphzise circuit controller, in con'ihinutiou, a plurality ofswitches having their QPCIfLtiIlfZ winnings connected in dif ferehtw-luises of the circuit, said switches being in arlocfied to operatesuccessively to close the several phases of the circuit, a fuse messes.

ARTHUR SIMON.

ilitnessm FRANKH. Helium,

JuANuTTn S. BRGCK. 3

dependent for their energizu-

